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contiki/apps/er-coap-13/er-coap-13.h
Daniele Alessandrelli 9230c0a158 Fix for coap_get_header_token() always returning 0 and not retrieving the token when using CoAP draft v13. 
Every reference to the old Token Option has been removed (in CoAP draft v13 the Token Option has been promoted to a field following the CoAP Header).
2013-07-22 19:36:01 +02:00

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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* An implementation of the Constrained Application Protocol (draft 12)
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
#ifndef COAP_13_H_
#define COAP_13_H_
#include <stddef.h> /* for size_t */
#include "contiki-net.h"
#include "erbium.h"
#define COAP_LINK_FORMAT_FILTERING 1
#define COAP_DEFAULT_PORT 5683
#ifndef COAP_SERVER_PORT
#define COAP_SERVER_PORT COAP_DEFAULT_PORT
#endif
#define COAP_DEFAULT_MAX_AGE 60
#define COAP_RESPONSE_TIMEOUT 2
#define COAP_RESPONSE_RANDOM_FACTOR 1.5
#define COAP_MAX_RETRANSMIT 4
#define COAP_HEADER_LEN 4 /* | version:0x03 type:0x0C tkl:0xF0 | code | mid:0x00FF | mid:0xFF00 | */
#define COAP_ETAG_LEN 8 /* The maximum number of bytes for the ETag */
#define COAP_TOKEN_LEN 8 /* The maximum number of bytes for the Token */
#define COAP_MAX_ACCEPT_NUM 2 /* The maximum number of accept preferences to parse/store */
#define COAP_HEADER_VERSION_MASK 0xC0
#define COAP_HEADER_VERSION_POSITION 6
#define COAP_HEADER_TYPE_MASK 0x30
#define COAP_HEADER_TYPE_POSITION 4
#define COAP_HEADER_TOKEN_LEN_MASK 0x0F
#define COAP_HEADER_TOKEN_LEN_POSITION 0
#define COAP_HEADER_OPTION_DELTA_MASK 0xF0
#define COAP_HEADER_OPTION_SHORT_LENGTH_MASK 0x0F
/*
* Conservative size limit, as not all options have to be set at the same time.
*/
#ifndef COAP_MAX_HEADER_SIZE
/* Hdr CoT Age Tag Obs Tok Blo strings */
#define COAP_MAX_HEADER_SIZE (4 + 3 + 5 + 1+COAP_ETAG_LEN + 3 + 1+COAP_TOKEN_LEN + 4 + 30) /* 70 */
#endif /* COAP_MAX_HEADER_SIZE */
#define COAP_MAX_PACKET_SIZE (COAP_MAX_HEADER_SIZE + REST_MAX_CHUNK_SIZE)
/* 0/14 48 for IPv6 (28 for IPv4) */
#if COAP_MAX_PACKET_SIZE > (UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN)
#error "UIP_CONF_BUFFER_SIZE too small for REST_MAX_CHUNK_SIZE"
#endif
/*
* Maximum number of failed request attempts before action
*/
#ifndef COAP_MAX_ATTEMPTS
#define COAP_MAX_ATTEMPTS 4
#endif /* COAP_MAX_ATTEMPTS */
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[UIP_LLH_LEN + UIP_IPH_LEN])
/* Bitmap for set options */
enum { OPTION_MAP_SIZE = sizeof(uint8_t) * 8 };
#define SET_OPTION(packet, opt) ((packet)->options[opt / OPTION_MAP_SIZE] |= 1 << (opt % OPTION_MAP_SIZE))
#define IS_OPTION(packet, opt) ((packet)->options[opt / OPTION_MAP_SIZE] & (1 << (opt % OPTION_MAP_SIZE)))
#ifndef MIN
#define MIN(a, b) ((a) < (b)? (a) : (b))
#endif /* MIN */
/* CoAP message types */
typedef enum {
COAP_TYPE_CON, /* confirmables */
COAP_TYPE_NON, /* non-confirmables */
COAP_TYPE_ACK, /* acknowledgements */
COAP_TYPE_RST /* reset */
} coap_message_type_t;
/* CoAP request method codes */
typedef enum {
COAP_GET = 1,
COAP_POST,
COAP_PUT,
COAP_DELETE
} coap_method_t;
/* CoAP response codes */
typedef enum {
NO_ERROR = 0,
CREATED_2_01 = 65, /* CREATED */
DELETED_2_02 = 66, /* DELETED */
VALID_2_03 = 67, /* NOT_MODIFIED */
CHANGED_2_04 = 68, /* CHANGED */
CONTENT_2_05 = 69, /* OK */
BAD_REQUEST_4_00 = 128, /* BAD_REQUEST */
UNAUTHORIZED_4_01 = 129, /* UNAUTHORIZED */
BAD_OPTION_4_02 = 130, /* BAD_OPTION */
FORBIDDEN_4_03 = 131, /* FORBIDDEN */
NOT_FOUND_4_04 = 132, /* NOT_FOUND */
METHOD_NOT_ALLOWED_4_05 = 133, /* METHOD_NOT_ALLOWED */
NOT_ACCEPTABLE_4_06 = 134, /* NOT_ACCEPTABLE */
PRECONDITION_FAILED_4_12 = 140, /* BAD_REQUEST */
REQUEST_ENTITY_TOO_LARGE_4_13 = 141, /* REQUEST_ENTITY_TOO_LARGE */
UNSUPPORTED_MEDIA_TYPE_4_15 = 143, /* UNSUPPORTED_MEDIA_TYPE */
INTERNAL_SERVER_ERROR_5_00 = 160, /* INTERNAL_SERVER_ERROR */
NOT_IMPLEMENTED_5_01 = 161, /* NOT_IMPLEMENTED */
BAD_GATEWAY_5_02 = 162, /* BAD_GATEWAY */
SERVICE_UNAVAILABLE_5_03 = 163, /* SERVICE_UNAVAILABLE */
GATEWAY_TIMEOUT_5_04 = 164, /* GATEWAY_TIMEOUT */
PROXYING_NOT_SUPPORTED_5_05 = 165, /* PROXYING_NOT_SUPPORTED */
/* Erbium errors */
MEMORY_ALLOCATION_ERROR = 192,
PACKET_SERIALIZATION_ERROR,
/* Erbium hooks */
MANUAL_RESPONSE,
PING_RESPONSE
} coap_status_t;
/* CoAP header options */
typedef enum {
COAP_OPTION_IF_MATCH = 1, /* 0-8 B */
COAP_OPTION_URI_HOST = 3, /* 1-255 B */
COAP_OPTION_ETAG = 4, /* 1-8 B */
COAP_OPTION_IF_NONE_MATCH = 5, /* 0 B */
COAP_OPTION_OBSERVE = 6, /* 0-3 B */
COAP_OPTION_URI_PORT = 7, /* 0-2 B */
COAP_OPTION_LOCATION_PATH = 8, /* 0-255 B */
COAP_OPTION_URI_PATH = 11, /* 0-255 B */
COAP_OPTION_CONTENT_TYPE = 12, /* 0-2 B */
COAP_OPTION_MAX_AGE = 14, /* 0-4 B */
COAP_OPTION_URI_QUERY = 15, /* 0-270 B */
COAP_OPTION_ACCEPT = 16, /* 0-2 B */
COAP_OPTION_LOCATION_QUERY = 20, /* 1-270 B */
COAP_OPTION_BLOCK2 = 23, /* 1-3 B */
COAP_OPTION_BLOCK1 = 27, /* 1-3 B */
COAP_OPTION_SIZE = 28, /* 0-4 B */
COAP_OPTION_PROXY_URI = 35, /* 1-270 B */
} coap_option_t;
/* CoAP Content-Types */
typedef enum {
TEXT_PLAIN = 0,
TEXT_XML = 1, /* Indented types are not in the initial registry. */
TEXT_CSV = 2,
TEXT_HTML = 3,
IMAGE_GIF = 21,
IMAGE_JPEG = 22,
IMAGE_PNG = 23,
IMAGE_TIFF = 24,
AUDIO_RAW = 25,
VIDEO_RAW = 26,
APPLICATION_LINK_FORMAT = 40,
APPLICATION_XML = 41,
APPLICATION_OCTET_STREAM = 42,
APPLICATION_RDF_XML = 43,
APPLICATION_SOAP_XML = 44,
APPLICATION_ATOM_XML = 45,
APPLICATION_XMPP_XML = 46,
APPLICATION_EXI = 47,
APPLICATION_FASTINFOSET = 48,
APPLICATION_SOAP_FASTINFOSET = 49,
APPLICATION_JSON = 50,
APPLICATION_X_OBIX_BINARY = 51
} coap_content_type_t;
/* Parsed message struct */
typedef struct {
uint8_t *buffer; /* pointer to CoAP header / incoming packet buffer / memory to serialize packet */
uint8_t version;
coap_message_type_t type;
uint8_t code;
uint16_t mid;
uint8_t options[COAP_OPTION_PROXY_URI / OPTION_MAP_SIZE + 1]; /* Bitmap to check if option is set */
coap_content_type_t content_type; /* Parse options once and store; allows setting options in random order */
uint32_t max_age;
size_t proxy_uri_len;
const char *proxy_uri;
uint8_t etag_len;
uint8_t etag[COAP_ETAG_LEN];
size_t uri_host_len;
const char *uri_host;
size_t location_path_len;
const char *location_path;
uint16_t uri_port;
size_t location_query_len;
const char *location_query;
size_t uri_path_len;
const char *uri_path;
uint16_t observe;
uint8_t token_len;
uint8_t token[COAP_TOKEN_LEN];
uint8_t accept_num;
uint16_t accept[COAP_MAX_ACCEPT_NUM];
uint8_t if_match_len;
uint8_t if_match[COAP_ETAG_LEN];
uint32_t block2_num;
uint8_t block2_more;
uint16_t block2_size;
uint32_t block2_offset;
uint32_t block1_num;
uint8_t block1_more;
uint16_t block1_size;
uint32_t block1_offset;
uint32_t size;
size_t uri_query_len;
const char *uri_query;
uint8_t if_none_match;
uint16_t payload_len;
uint8_t *payload;
} coap_packet_t;
/* Option format serialization*/
#define COAP_SERIALIZE_INT_OPTION(number, field, text) \
if (IS_OPTION(coap_pkt, number)) { \
PRINTF(text" [%u]\n", coap_pkt->field); \
option += coap_serialize_int_option(number, current_number, option, coap_pkt->field); \
current_number = number; \
}
#define COAP_SERIALIZE_BYTE_OPTION(number, field, text) \
if (IS_OPTION(coap_pkt, number)) { \
PRINTF(text" %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", coap_pkt->field##_len, \
coap_pkt->field[0], \
coap_pkt->field[1], \
coap_pkt->field[2], \
coap_pkt->field[3], \
coap_pkt->field[4], \
coap_pkt->field[5], \
coap_pkt->field[6], \
coap_pkt->field[7] \
); /*FIXME always prints 8 bytes */ \
option += coap_serialize_array_option(number, current_number, option, coap_pkt->field, coap_pkt->field##_len, '\0'); \
current_number = number; \
}
#define COAP_SERIALIZE_STRING_OPTION(number, field, splitter, text) \
if (IS_OPTION(coap_pkt, number)) { \
PRINTF(text" [%.*s]\n", coap_pkt->field##_len, coap_pkt->field); \
option += coap_serialize_array_option(number, current_number, option, (uint8_t *) coap_pkt->field, coap_pkt->field##_len, splitter); \
current_number = number; \
}
#define COAP_SERIALIZE_ACCEPT_OPTION(number, field, text) \
if (IS_OPTION(coap_pkt, number)) { \
int i; \
for (i=0; i<coap_pkt->field##_num; ++i) \
{ \
PRINTF(text" [%u]\n", coap_pkt->field[i]); \
option += coap_serialize_int_option(number, current_number, option, coap_pkt->field[i]); \
current_number = number; \
} \
}
#define COAP_SERIALIZE_BLOCK_OPTION(number, field, text) \
if (IS_OPTION(coap_pkt, number)) \
{ \
PRINTF(text" [%lu%s (%u B/blk)]\n", coap_pkt->field##_num, coap_pkt->field##_more ? "+" : "", coap_pkt->field##_size); \
uint32_t block = coap_pkt->field##_num << 4; \
if (coap_pkt->field##_more) block |= 0x8; \
block |= 0xF & coap_log_2(coap_pkt->field##_size/16); \
PRINTF(text" encoded: 0x%lX\n", block); \
option += coap_serialize_int_option(number, current_number, option, block); \
current_number = number; \
}
/* To store error code and human-readable payload */
extern coap_status_t coap_error_code;
extern char *coap_error_message;
void coap_init_connection(uint16_t port);
uint16_t coap_get_mid(void);
void coap_init_message(void *packet, coap_message_type_t type, uint8_t code, uint16_t mid);
size_t coap_serialize_message(void *packet, uint8_t *buffer);
void coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length);
coap_status_t coap_parse_message(void *request, uint8_t *data, uint16_t data_len);
int coap_get_query_variable(void *packet, const char *name, const char **output);
int coap_get_post_variable(void *packet, const char *name, const char **output);
/*-----------------------------------------------------------------------------------*/
int coap_set_status_code(void *packet, unsigned int code);
unsigned int coap_get_header_content_type(void *packet);
int coap_set_header_content_type(void *packet, unsigned int content_type);
int coap_get_header_accept(void *packet, const uint16_t **accept);
int coap_set_header_accept(void *packet, uint16_t accept);
int coap_get_header_max_age(void *packet, uint32_t *age);
int coap_set_header_max_age(void *packet, uint32_t age);
int coap_get_header_etag(void *packet, const uint8_t **etag);
int coap_set_header_etag(void *packet, const uint8_t *etag, size_t etag_len);
int coap_get_header_if_match(void *packet, const uint8_t **etag);
int coap_set_header_if_match(void *packet, const uint8_t *etag, size_t etag_len);
int coap_get_header_if_none_match(void *packet);
int coap_set_header_if_none_match(void *packet);
int coap_get_header_token(void *packet, const uint8_t **token);
int coap_set_header_token(void *packet, const uint8_t *token, size_t token_len);
int coap_get_header_proxy_uri(void *packet, const char **uri); /* In-place string might not be 0-terminated. */
int coap_set_header_proxy_uri(void *packet, const char *uri);
int coap_get_header_uri_host(void *packet, const char **host); /* In-place string might not be 0-terminated. */
int coap_set_header_uri_host(void *packet, const char *host);
int coap_get_header_uri_path(void *packet, const char **path); /* In-place string might not be 0-terminated. */
int coap_set_header_uri_path(void *packet, const char *path);
int coap_get_header_uri_query(void *packet, const char **query); /* In-place string might not be 0-terminated. */
int coap_set_header_uri_query(void *packet, const char *query);
int coap_get_header_location_path(void *packet, const char **path); /* In-place string might not be 0-terminated. */
int coap_set_header_location_path(void *packet, const char *path); /* Also splits optional query into Location-Query option. */
int coap_get_header_location_query(void *packet, const char **query); /* In-place string might not be 0-terminated. */
int coap_set_header_location_query(void *packet, const char *query);
int coap_get_header_observe(void *packet, uint32_t *observe);
int coap_set_header_observe(void *packet, uint32_t observe);
int coap_get_header_block2(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset);
int coap_set_header_block2(void *packet, uint32_t num, uint8_t more, uint16_t size);
int coap_get_header_block1(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset);
int coap_set_header_block1(void *packet, uint32_t num, uint8_t more, uint16_t size);
int coap_get_header_size(void *packet, uint32_t *size);
int coap_set_header_size(void *packet, uint32_t size);
int coap_get_payload(void *packet, const uint8_t **payload);
int coap_set_payload(void *packet, const void *payload, size_t length);
#endif /* COAP_13_H_ */
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